When WebGL page like the following is shown, RenderCompositorD3D11SWGL does not use external compositing. - https://developer.mozilla.org/ja/docs/Web/API/WebGL_API/Constants Then WebGL texture data was read back with RenderDXGITextureHost::MapPlane(). - https://searchfox.org/mozilla-central/rev/0db73daa4b03ce7513a7dd5f31109143dc3b149e/gfx/webrender_bindings/RenderD3D11TextureHost.cpp#114
Bug 1679480 Comment 0 Edit History
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When WebGL page like the following was shown, RenderCompositorD3D11SWGL did not use external compositing. - https://developer.mozilla.org/ja/docs/Web/API/WebGL_API/Constants Then WebGL texture data was read back with RenderDXGITextureHost::MapPlane(). - https://searchfox.org/mozilla-central/rev/0db73daa4b03ce7513a7dd5f31109143dc3b149e/gfx/webrender_bindings/RenderD3D11TextureHost.cpp#114